Polarr - MacOS, Windows, iOS, Android and online photo editing tools & free photo editors.
AfterLight - AfterLight is the perfect image editing app for quick and straight forward editing.
Exacto - Quickly remove unwanted backgrounds from photos
RNI Films - Real film filters for iPhone photographers
remove.bg for Photoshop - Remove the background of any image 100% automatically
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.